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Topic: 302 year difference (Read 3358 times)

I have a 92 with a bad shortblock. I have purchased an 87 shortblock to build back to std spec. Question is Summit shows a year break in their part kits. What is the difference in 86-90 and 91-93 blocks and assemblys? I never thought there was. Those are the year breaks for the kits. Any info will help, Thanks!